Thermostatic control for stove ovens



March 30 1926. 1,578,939 I A.l H. TINNERMAN THERMOSTATIC CONTROL FOR STOVE OVENS 'Filed May 9. 1924 2 Sheets-Sheet l 25 *iff a .w L.; n f .x v -n 6 PK f4 Z7 21 z o vPA/.Egs

Patented Mar. 30, 1926. x

PATENT OFFICE.'

ALBERT E. TINNERMAN, F CLEVELAND, OIO..

'HERMOSTATIC ACON'TROI'.. FOR STOVE OVENS.

' Application med May 9,

To aZZwwm z't may concern: I f

Be it known that I, ALBERT II. 'I1NNER MA-N, a citizen of the United States, residing atCleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and usefulA Improvement in a Ther- ,mostatic Control for Stove Ovens, of which the following is a full, clear, and exactdescription-7 reference being lhad to the accompanying'drawings. 1

This invention is concerned with cook 'stoves and is directed to the installation of thermostatic controls for' regulating the temperature of the stove oven.

The general object of my invention is directed'to the provision of a novel arrangement for installing a thermostatic 'control on a gas range^oven Whereby'the thermosta't may7 be disposed entirely within' the oven and may be regulated exteriorly of the oven.

Thereare two types of thermostatic control installations which lhave met .with the approval of `stove manufacturers, namely,

the type which'has the regulating means disposed exteriorly of the ovenv and from which extends the thermocouple passing through a wall of the oven and into the interior thereof. The second type comprises a thermostatic control mechanism which is Vdis-posed completely within the oven with the regulating means positioned adjacent the door opening of the oven. The former type is obiectionable for the reason that the exposed parts of the thermostat accumulate dirt and generally detract from the effect .of the symmetrical appearance of the stove structure, while the latter type is objectionable for the reason that 'once the oven is heated and itis vdesired to reset 'the thermostat to a different ltemperature control, the lack of illumination and partial inaccessibility makes it -very inconvenient to adjust thethermostat. The latter type has '45 the advantage, however,.in that it is completely enclosed within the stove oven. More specifically therefore, the object of my invention -is to provide a 'thermostatic control installation which may be completely. inclosed within the stove oven, preferably in an upper corner thereof and which may have means extending through or as-i sociated with the door or oven walls whereby the thermostat may' be set to a desired 1924. Serial No. 711,955.

' temperature controll without necessitating reaching into the oven.

Other objects of my invention will hereinafter be set forth in the following description referring to the accompan 'ngdrawings illustrating a preferred orm thereof. The essentlal characterlstics are summarized inthe claims.

In the drawings, Fig. 1 isa cross-sectional elevation of a stove oven showing a preferred form ofmy novel thermostatic control installation; Fig. 2 is a fragmentary' front elevation f the Vdoor and oven of the stove; Fig. 3 is an enlarged fra entary cross-sectional view of a portion o the door associated with the thermostatic control;

Fig. 4 is'an enlarged front elevational view of one corner of the door frame provided with a thermostatic dial; Fig. 5 is a crosssectional detail taken substantially along the line 5--5 of Fig. 3; Figs. 6 and 7 are perspective views of the end of a control memi ber for the thermostat.

In Fig. 1, Ipshow a stove comprising an oven O having a thermostatic control device'I installed in the upper right hand corner thereof.` y This thermostatic device may comprise a valve head 10 secured to .the rear wall 11 of the stove oven structure.

A pipe line 12 may extend 'from a mixer 13 associated with a gas line" 14 extending rear-- wardly from the feed line l15 at the front of the stove. The line 12 extends into, the valve body 10 on one side. of a spring ressed diaphragm 16 which comprises a t ermostatic valve, opening and yclosing communication between the l1ne'12 and a burner line 18 extending'from the valve body 10 .on

the opposite sidefof the diaphragm 16 to the oven burner 20 disposed beneath the bottom panel of the oven. In the resent thermostatic device, the operation'of tlhe of al copper tuhek 22 which may encase a an adjustable screw member26 in threaded engagement with a dial head 27 secured ,to the 4front end of the copperl tube 22.- Supdia-I yphragmpl' is controlled by the expansion loo porting means in the -form of la bracket 28' may be provided to support the frontend of the therrnostatic device. The 4member K 26 may be provided with a pointer 29 which 1 by the meinber 26 may be adjusted without opening the oven door` and I provide a duplicate valvepr dial on the door frame which may be set to conform with the markings on the inner dial 30.

In the presenty instance, I provide an opening in the door frame 36 which aligns withethe member 26 and I also provide an extension 26a upon the member 26 which will project thflough the opening 35 when the door is completely closed, the opening of course being oaf-slightly greater diameter thanl the .diameter of the extension 26a. To. permita \free swinging of the door frame, `a largerI opening 38 is provided in -the dooi` lining39. A conic'sleeve 40 may be inserted between the lining and the inner ace 'oft-he door frame 36 to support the lining about theI periphery of the opening n 38 as well as to prevent the undue passage of heat through the inner o en ing in the lining 39 between the dojor rame and the lining and also toprevent foreign matter 'accumulating between' the lining and door.

The sleeve 40 may be maintained in place in any suitable' manner, 'for example, by lugs 41 formed on the `doorl frame which engage the outer or smaller end 'of the conic sleeve 40 and prevent displacement thereof'. The lining when secured in place of course serves to maintain the sleeve in engagement with the lugs.

An adjustable dial is mounted upon the oter face of the .door frame 36 with .j ra central aperture thereof aligning with the 50.0 dial mayhave markings corresponding to opening 35'formed in 'the-door frame. This ,the markings of the innerdial 30 and may 1 50 may bear thereon'and thereby be mainlbe set to conform therewith. The dial 50- may be maintained in V`place by a4 washer 51 held by screws 52 so spaced that the dial tained'in proper relation to the vaperture in .the door frame as shown in Fig. 4. When the dial is once positioned to have the mark# ings thereof conform to' thefposition of the corresponding lmarkings on the inner dial 30,l the screws 52' may be Itightened and f the outer dial is thus permanently set. The outer endof the extension 26 of the@ adjusting member 26 m/ay bel provided with a slot 26."i\-n alignment with the inner pointof. the door, a dial lmounted uponY the door V. l v y l i I y y l I rX A n er 29, slot 26'b'being opengonone*v side Whereby a key maybe inserted in the slot and the member 26 set tothe desired control position without any possibility ofconfuslon and to which Way the pointer 60a on the key 60 should be positioned.-

It will bel seen that the foregoing arrangement only necessitates the provision of an auxiliar dial surrounding an opening formed in t e door of the oven and an extension on the 'usual thermostat "passing `through `this opening, the -form of the extension and of the opening being such that the door may be swung reely without interf'ering withthe responsive action o f the thermostat to the heat-ofthe oven.

It is to be understood that the'dial may be *positioned on the oven frame 'and not on .the door and the extension passed through an opening formed vin the frame of the stove or any other members comprising the frame of the stove.

I claim: l. Inv a stove the combination of an oven structure includ-ing a door, a thermostatic control device 4enclosed by the oven and mounted independently of the door, a dial mounted upon the door andmeans extending from vthe thermostatic control device to the dial whereby-the thermostat may be set Wit-hout opening the door.

2. In combination a stove having a, baking oven and a door therefor`a thermostatic control device-responsive to thev heat of the loven and mounted in'the latterindepend- -ently-'ofl the door and Vmeans extending -through an opening ir the door and associated withthe thermostatic control Jdevice for setting the thermostat.'

3. In combination'a stove having a baking control' device responsive to thse heat of the yoven for -controlling the temperature thereof, said device being suspended in the oven independently of the doo-r, and means extendingbetween the door and the thermo-v i' Joven and a door therefor, a thermostatie static control device for setting the thermostat exteriorly of the oven.

4. Ina stove the combination of an oven structure including adoor, athermostatic couple enclosed by the oven and mounted therein independently vof the door, a'gas valve operated by expansion and `contraction of the thermostatic couple, and means extending from the thermostatic cuplc through the door whereby the thermostat may b e'set without opening the door. In a gas range ofthe character described, the combination of an oven structure* includinga door, a horizontally disposed thermostatic couple 'positioned'in the upper region of "the oven and completely enclosed thereby, said thermostatic couple being 'mounted inthe yoven independently 'I loo . oven structure, Ia burner therefor, a mainl the thermostatic couple and the door for -setting t-he thermostatic couple without openling the door. fv

6. In a gas range. of 'thecharacterdescribedgthe combination ofan oven struc' ture includinga door, a thermostatically rsponsive device 'positioned in the upper region of the oven independently of lthe doorand completely enclosed by the oven and an vextension memberprotrudingfrom said device through the door whereby it maybe adusted withoift opening the door.

7.-In a gas range ofthe character. de.- scribed, an oven st1ucture,a door therefor,

aI vthermostatic device controlling alkvalve` 1n a burner l1ne, said device being immov- I able relat1ve tothe door and mounted-within.

2O-'tHe oven independently. of lthe door, `,and means: extending between the door'and the thermostatic control device-for setting the deviceu .without opening the door.

8.*In a gas range the combination of a gas -4 line disposed along the front-o the range:

a gas line extending from' sald front gas lineto the rear of the range, a thermostatically controlled valve, a burner connected 4to theline, the valve being disposed -between the burner andthe front gas line, an oven door, a thermostatic couple mounted withintlie oven of the range independently of the 'oven door, an extension member between the. door and the thermostatic couple, a dial on' the door and means foi-'setting the extension member to a de'iinite position relative to the ial without necesitatingan opening of the oor. f .4 9. In a gas range the combination yofvan *U oyen] structure, including anA oven door, a burner for said oven, a main gas line, "a

vthermostatically controlled valve disposed' between the burner andv main gas line, a

' -thermostatic couple completely enclosed by.

' the oven anld fixed therein and terminating adjacent the oven` dioor, said thermostatic couple serving to control the valve and 'means extending through an opening in the door \for setting the thermostatic couple.-

10. In av gasrange the combination of an gas line, athermostatically controlled valve v disposed between the burner and main gas line, a thermostatic couple completely mounted withifnthe oven and terminatingadjacent the oven\door, said couple Icontrolling the valve and means extending through an opening in the door of the oven for setting the thermostatic couple. 0- 1 1. In a gas range the combination of an Y justing member relative t-o the dial o n oven struc-ture, a main gas line, a burner for4 the oven, a L'line connecting the main gas. line to the burner, a thermostatically controlled valve disposed in the last named line between thefgas 4line and the burner, a 65 -"thermos'tatic couple for automatically operating said Valve and an adu'stable member.

for adjusting one of the members compris ing the thermostatic couple, an oven door movable relative to said adjust-able member, a-'dialjsurrounding anppening in the door, said adjustable member extending through said'opening and means'for settingy said adthe door. l

12.--.In a gas range the combination of a "main gas line, an oven structure, a burner for,the oven, a gas line betweenl the main gas line and the burner, a thermostatically ycontrolled valve controlling the last named 80 line, a thermostatic couple comprising two members having different coeiic1ents of eX- `pansion, one of the members serving to operate'said valve and means for :adjusting one of said members*v whereby one member will Si ,move the other upon expansion or contraction. thereof, saidv means beingy immovable relative to theI door when the door is swung and extending through an opening'i'n the lsoven door whereby the relative /movement between the two members may be adjusted exteriorly ofthe oven.

13.111 a gas range the combination lof a main gas line, an oven structure, a burnerl for the oven, agas line between the main 95 l gas line andthe burner, a thermostatically controlledvalve controlling the last named i line, a vthermostatic couple xed within theel oven land serving to operate said valve and means for adjusting the couple for regulating the reactipnltherof upon the valve, said means extending through an o ening in\the oven door but permitting the v oor to swing. freely, while the thermostatic couple re-l. mains fixed within the oven.

14. In a gas range the combination of an oven structure, including a door, a burner therefor, a main 'gasline, a thermostatically controlled-valve disposed between the burner and main gas line, a .thermostatic couple 110 completely enclosed by the oven and terminating adjacent the oven door, a dial on the couple, a second di/al on the' door, and means extending between the dials for setting the Idials in unison, while adjusting'the thermostatic couple.-

-In testimony whereof, I hereunto afiix my. signature. i 

